penumbra
/pษหnสmbษนษ/IPA: /P IH0 N AH1 M B R AH0/
- 1
A partially shaded area around the edges of a shadow, especially an eclipse.
- 2
A region around the edge of a sunspot, darker than the sun's surface but lighter than the middle of the sunspot.
- 3
An area of uncertainty or intermediacy between two mutually exclusive states or categories.
- 4
An area that lies on the edge of something; a fringe.
- 5
Something related to, connected to, and implied by, the existence of something else that is necessary for the second thing to be full and complete in its essential aspects.
- 6
(in "ischaemic penumbra", after a stroke) A region of the brain that has lost only some of its blood supply, and retains structural integrity but has lost function.
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